During the last decade, many new charmonium-like states above/near open-charm
thresholds, such as \(X(3940)\) , \(X(4140/4274)\) , \(Y(4230/4260)\) ,
\(Y(4360)\) , \(Y(4660)\) , \(X(4500)\)  and \(X(4700)\) , have been reported by the
Belle, BaBar, LHCb, BESIII, CLEO Collaborations and so on [1]}.
Lately, a new charmonium-like state \(X^*(3860)\)  was observed in the
\(e^+e^-\rightarrow J/\psi D\bar{D}\)  process by the Belle
Collaboration [2]}. These newly observed charmonium-like states have attracted a lot of attention from the hadron physics community. One obvious feature is that most of them have masses located around \(S\) -wave open-flavor thresholds and cannot be easily accommodated by
the conventional quark model. Because of this, they have initiated tremendous interests
and different ideas. Detailed reviews on the status of these charmonium-like states can be found in
Refs. [3]}, [4]}, [5]}, [6]}, [7]}, [8]}, [9]}, where some of these states are categorized as exotic hadrons.
